This page explains how Marcin Kurcz (USATT# 72817)'s rating went from 1423 to 1417 at the Killerspin Holiday Open held on - 30 Dec 2006. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.